I feel reasonably knowledgeable about the following games, and own many of them (alphabetical order):

Bang!

Dodge City expansion

Fistful of Cards expansion

Castle Risk

Blokus

Blokus: Trigon

Bohnanza

High Bohn expansion

♥ Hearts

Memoir '44

Pirates' Cove

Risk

Scrabble — I stink at it, though!

Sequence

Skip-Bo

♠ Spades

Spite and Malice

Ticket to Ride

1910 expansion

Ticket to Ride: Switzerland

Ticket to Ride: The Card Game

My least favorite games:

Monopoly* — It lasts hours, it's not very intellectually or socially entertaining, you have all sorts of house rules (many of which break the game or prolong an already insufferable game), people say they don't like board games when they really just hate Monopoly and haven't discovered better games....

Risk — The game is actually quite fixable, it's just that it's normally not very enjoyable. I think it's the worst when people make alliances based on factors outside of the game, or when people change how they're playing because they're losing and they decide they (don't) want a certain person to win. I also don't like how strong of a factor luck is in the game. A person with poor strategy can often beat a person with good strategy just out of luck. However, playing on the computer with nearly-instant attack resolution and playing with missions are both improvements. So are the variants like Risk 2210 and Castle Risk.